Aqueous dispersion coating composition capable of reducing noise and/or friction

FIELD: chemistry.

SUBSTANCE: composition includes a polymer mixture which contains a) an aqueous dispersion of at least one polysiloxane and b) an aqueous dispersion of at least one polyurethane, in which content of the said at least one polysiloxane polymer varies from approximately 50 to 85 wt %, and content of the said at least one polyurethane varies from approximately 15 to 50 wt %, in terms of total weight of solid substances of the said at least one polysiloxane polymer and the said at least one polyurethane and c) polyolefin powder with ultrahigh molecular weight in amount of approximately 5-35 pts. wt per 100 total parts by weight of the said at least one or more polysiloxanes and the said one or more polyurethanes. The said polyurethane is obtained from at least one aliphatic or cycloaliphatic diisocyanate and at least one hydroxyl ending intermediate compound such as polycarbonate, polyester or polyether or combination thereof, and is heat-curable. The said aqueous dispersion contains approximately 7 wt % or less of an organic solvent in terms of total weight of the said dispersion composition, and the said polymer mixture contains from approximately less than 10 to 0 parts by weight of a substance for increasing adhesiveness per 100 total parts by weight of the said at least one polyurethane and the said at least one polysiloxane; and contains from approximately less than 10 to 0 parts by weight of a halogen-containing polymer per 100 total parts by weight of the said at least one polyurethane and the said at least one polysiloxane. The invention also describes versions of a polymer or rubber substrate and versions of a sealant for vehicles, at least partially coated with the dried composition described above.

EFFECT: low noise level when substrate coated with the said composition moves or is in contact with an article, as well as obtaining a surface with low coefficient of friction which does not increase with time.

17 cl, 14 ex, 10 tbl, 1 dwg

 

The technical FIELD

The present invention relates to organic, free from solvent water compositions, which, being deposited in the form of a coating on a rubber or polymeric substrate, such as seals for vehicles, and reduces the level of noise generated by the substrate in contact with the item, and stores the initial static coefficient of friction with it for some period of time.

The LEVEL of TECHNOLOGY

To date, the seals for vehicles, providing a barrier to external natural phenomena such as wind, rain, snow and freezing rain, usually not reduced, and even contributed to the increase of the noise level in the vehicle. Thus, vehicles often had the level of internal noise is much higher than 40 dBA.

Seals for vehicles, such as seals for cars, has been used for several years, beginning with urethane systems, obtained using solvents, and more recently with the aqueous urethane systems. Although such coatings must pass various performance tests for cars (varying depending on the manufacturer of the component parts (OEM), they usually have unwanted noise. Moreover, the low coefficient of friction (COF) Oba is but not saved because this coating contains various fillers such as various kinds of wax or silicone, which migrate to the surface of the seal and eventually removed, which leads to an increase of the coefficient of friction.

Japanese abstract 61155432 describes a composition for coating, which, being deposited on the surface of the polymeric elastomer, such as detail, especially of the non-polar rubber, presumably improves adhesion, oiliness, hydrophobicity, resistance to freezing, abrasion resistance, etc. of the elastomer due to the use of the main components of the composition for coatings cured polyurethane, thermosetting silicone and substances to improve adhesiveness.

Japanese abstract 61155431 describes a composition for coating, which, being deposited on the surface of the polymeric elastomer, such as EPT (ethylene propylene diene monomer) rubber, supposedly able to improve its adhesion, oils, water repellency, abrasion resistance, resistance to freezing, etc. through the use of thermosetting polyurethane, polyorganosiloxane composition and increases the stickiness of the substance as a main component of a composition for coating.

Japanese abstract 61138636 describes a composition containing a curable polyurethane, consisting the th of the polyvalent isocyanate and the polyol, and curing the silicone to as film-forming elements, providing a strong link in the deposition of one layer and the forming surface, presumably having good sliding capability, hydrophobicity, sound-proof properties, and resistance to abrasion.

Japanese abstract 58071233 describes the prevention of noise from friction and presumably improve the skid resistance and adhesion by forming the upper fixing cover using the agent for surface treatment containing polymer with a specific composition of the polyurethane coating.

U.S. patent No. 6742784 describes the seals or movement of the glass in the car. The seal consists of a main mass, formed by the elastomer. The contact part, which slides detail, other than seal, permanently formed on the bulk and contains a material having at least one of the properties, such as hydrophilicity and the ability to absorb water. The moving part may be integrated with the main mass, forming an integral structure, in which the sliding part is formed of elastomer, and the elastomer core mass and the moving part containing material with at least one of the properties, such as hydrophilicity and str is functioning to absorb water.

BRIEF DESCRIPTION of DRAWING

The drawing shows a view in cross section of a conventional seal for vehicles, having a coating according to the present invention.

The INVENTION

Aqueous dispersion composition in the form of a coating for rubber or polymer contains a polymer mixture comprising at least one polysiloxane in the amount of approximately from 50 to 80 wt.% and at least one thermoset polyurethanes per se, derived from aliphatic diisocyanate, based on the total weight of said polysiloxane and all of polyurethane polymers. Impose various fillers such as polyolefin polymer with high heat resistance and high molecular weight in an amount of from about 5 to 35 weight parts per total weight of polymer solids, such as at least one siloxane and at least one thermoset polyurethane. Other fillers such as various polyamides, silica, polytetrafluoroethylene powder siloxane rubber and ceramic spherical particles generally lower level of dry noise, but, as a rule, do not reduce the level of wet noise. The resulting dispersion coating is essentially free from organic solvents and when applied to polymeric or rubber substrate, the Yu as the seal of EPDM (monomer ethylene-propylene-diene), reduces interior noise of the vehicle to a value less than approximately 38 dBA. These coatings also provide the surface with a low coefficient of friction, which unlike conventional seal coating does not improve over time.

DETAILED description of the INVENTION

Physical water dispersion composition for coatings according to the present invention contains at least one polysiloxane preferably in the form of an aqueous dispersion comprising at least one repeating unit, and having the formula:

in which R1and R2independently of one another represent alkyl containing from 1 to about 4 carbon atoms with methylgroups. Accordingly, (polydimethylsiloxane) preferably represents polysiloxan. One or more polysiloxanes provide abrasion resistance and lower coefficient of friction after coating on a substrate and curing. Suitable Srednekanskaya molecular weights typically range from about 100,000 to 500,000 and preferably from about 200000 to 400000. Such polysiloxane known in the art and described in the literature, they are commercially available and typically have a solids content of prophetic the TV from about 20 to 50 wt.%, preferably from about 25 to 40 wt.% water.

Polysiloxane according to the present invention is essentially free of amine end groups. This means that typically less than about 10 wt.%, preferably, less than about 5 wt.% and preferably less than about 2 wt.% or about 1 wt.% of the total amount of polysiloxane polymers carry the amino group. Most preferably, the polysiloxane polymers not bore the amine end group. The total number of at least one polysiloxane per se, i.e. the total amount of the polymer (polymers) (100% solids and no water), calculated on the total weight of all of one or more siloxanes and all of one or more polyurethanes per se, i.e. the total amount of the polyurethane polymer (polymers) (100% solids and no water) is usually from about 50 or 53 to about 85 wt.%, preferably, from about 55 to 80 wt.%, preferably from about 60 to 75 wt.%.

Various one or more of the polyurethanes preferably in the form of aqueous dispersions provide structural integrity and resistance against natural phenomena such as wind, rain, freezing rain, and snow, and also resistant to extreme low and high temperatures. Such polyurethanes awsomecameron available and can be obtained from one or more polyisocyanates and one or more hydroxyl-terminated intermediates, such as polycarbonate, complex polyester or polyester, or combinations thereof, with the preferred intermediate compound is polycarbonate.

Polycarbonates, also called dimer tiolovymi carbonates, known in the art and described in the literature, are connected together by carbonate groups, ie:

and include one or more hydrocarbon groups containing from about 1 to 20 carbon atoms, bisphenol a is very common and desirable group. Polycarbonate is preferably derived from one or more aromatic diols such as bisphenol a, tetrabromo bisphenol a, tetramethyl bisphenol a, 1,1-bis(4-hydroxyphenyl)-1-Penilaian, 3,3-bis(para-hydroxyphenyl)phtalic or bishydroxycoumarin. The polycarbonates can be obtained from the starting materials by any of several known methods such as methods using interphase boundaries, solution or melt. As is well known, suitable to complete the chain of agents and/or razvitsya agents can be used to obtain a desired molecular weights and degrees of branching. Polycarbonate can be derived from two or more different aromatic diols or aromatic diol and glycol or hydroxyl-terminated by eltisley complex polyester, or dibasic acid upon receipt of polycarbonate copolymer or heteropolymer, not homopolymer.

The intermediate polyether, well known in the art and described in the literature, usually have a duplicate link-R-O-in which R represents akilagpa containing from 1 to 6 carbon atoms, preferably 2 or 3 atoms, i.e. ethylene or propylene. Examples of polyurethane dispersions based on water and methods for their preparation, are known in the art and the literature described in U.S. patent 5312865, 5555686, 5696291, 4876302 and 4567228 contained herein entirely by reference. Usually urethanes hydrophilic polyester can be obtained by using a polyether polyol containing at least two, preferably three hydroxyl groups with Srednekanskaya molecular weight from about 2000 to 20,000, preferably from about 2000 to 5000, preferably from about 4000 to 5000 and the molar ratio messy parts of ethylene oxide (EO) to the oxide of the highest alkylene average of from 1:1 to 4:1. The oxide alkylene may be selected from propylene oxide (PO), butylene oxide, oxide pentylene, oxide of hexylene, oxide trimethylene, oxide tetramethylene and mixtures thereof. Hydrophilic polyol prefer is Ino is a polyol of polyoxyethylene-propylene, including, for example, from about 50 to 70% SW and from about 30 to 50% RO. Especially preferred polyester triol is a connection involving approximately 68% of SW and approximately 32% RO. Upon receipt of hydrophilic polyols can be used an alternative ratio EO:PO provided that they do not have a material adverse effect on the resulting polyol. Such relationships can be established by tests.

Various hydroxyl-terminated polyesters include the relationship of the formula:

and usually are products of the interaction of dicarboxylic acid or anhydride containing from about 2 to 10 or 20 carbon atoms, with diola containing from about 2 to 20 carbon atoms, with preferred is a content of approximately from 2 to 6 or 8 carbon atoms. Examples of dicarboxylic acids and anhydrides include maleic acid, maleic anhydride, succinic acid, glutaric acid, glutaric anhydride, adipic acid, cork acid, timelineview acid, azelaic acid, sabotinova acid, chlorendic acid, 1,2,4-butane-tricarboxylic acid, phthalic acid, the isomers of phthalic acid, phthalic anhydride, fumaric acid, dimeric fatty sour is s, such as oleic acid, etc. and mixtures thereof. Examples of diols include various alkalophile, for example, ethylene glycol, 1,2 - and 1,3-propylene glycols, 1,2-, 1,3-, 1,4 - and 2,3-butyleneglycol, hexandiol, neopentylglycol, 1,6-hexanediol, 1,8-octanediol, and other glycols such as bisphenol a, cyclohexanediol, cyclohexanedimethanol(1,4-bis-hydroxymethylcellulose), 2-methyl-1,3-propandiol, 2,2,4-trimethyl-1,3-pentanediol, triethylene glycol, tetraethylene glycol, polyethylene glycol, dipropyleneglycol, polypropyleneglycol, dibutylamino, poliatilenglikol, caprolactone, demertzis, gidroksilirovanii bisphenola, halogenated diols and the like, and mixtures thereof. Preferred diols include ethylene glycol, propylene glycol, butyleneglycol and hexanediol. Such polyesters are well known in the art and the literature.

Ending with a hydroxyl polyurethane intermediate compounds according to the present invention may also contain other hydrophilic groups for the purpose of improving dispersion of polyurethane in water. Such hydrophilic groups are usually a side branch from the main chain and include hydroxyl group, carboxyl group, etc. and subjected to cross-linking, which leads to the curing of urethane. Examples of hydroxyl groups Ho is Osho known and include glycols, listed above in connection with the formation of intermediate compounds of ester and here entirely as a reference. Examples of the carboxyl groups are also known in the art and the literature and can include a hydroxy-carboxylic acid having the General formula (HO)xQ(COOH)yin which Q represents a straight or branched hydrocarbon radical containing from 1 to 12 carbon atoms, and x and y independently of one another have the value from 1 to 3. Examples of such hydroxy-carboxylic acids include, but are limited to, citric acid, dimethylolpropionic acid (DMPA), dimethylaluminum acid (DMBA), glycolic acid, lactic acid, malic acid, dihydroxypregna acid, dihydroxybenzoic acid, etc. and mixtures thereof.

Various isocyanates subjected to interaction with one or more hydroxyl-terminated intermediate compounds, preferably represent an aliphatic or cycloaliphatic diisocyanate, giving the polyurethane ability to atmospheric conditions. Examples of suitable diisocyanates containing from 4 to about 20 carbon atoms include 4,4'-diisocyanate dicyclohexylmethane (H12MDI), 3,5,5-trimethyl-1-isocyanato-3-isocyanatomethyl (isophorone diisocyanate Il the IPDI), the diisocyanate of tetramethylene, cyclohexane 1,3-bis(isocyanatomethyl), the diisocyanate of hexamethylene (HDI) and the diisocyanate of dodecahedrane. The use of three - or tetraisostearate will undoubtedly lead to cross-linking of the polyurethane.

Obtaining polyurethanes used in the present invention, it is well known in the art and the literature; they are commercially available, as well as receive them. Thus, communication is usually carried out in an organic solvent such as methyl ethyl ketone or n-organic, etc. Preferably adding a neutralizing agent that improves the compatibility of polyurethane with water. Neutralizing agents include amines, such as N-methylmorpholine, triethylamine, dimethylethanolamine, methyldiethanolamine, dimethylethanolamine of the research, 2-amino-2-methyl-1-propanol and the like, and mixtures thereof. Typically requires a lengthening of the chain, and, despite the fact that can be used in a variety of diols, desirable is the use of diamines, generally comprising from about 2 to 20 carbon atoms. Examples include Ethylenediamine, 1,6-diaminohexane, piperazine, Tris(2-amino-ethyl)amine and amine-terminated polyethers, and mixtures thereof, etc. After neutralization usually add water. Then the organic solvent can be removed using the and various known methods, such as evaporation, extraction and the like, to obtain an aqueous polyurethane with high molecular weight.

Srednekanskaya molecular weight of the polyurethanes according to the present invention typically range from about 50,000 to 500,000, with the preferred values are amounting to approximately 150,000 to 400,000. The amount of solid urethane in water is usually from about 20 to 50 wt.%, preferably from about 25 to 40 wt.%. Preferred are polycarbonates based on polyurethanes.

The number of one or more polyurethanes per se, i.e. the total amount of polymer (polymers) (100% solids and no water)used in the aqueous dispersion composition according to the present invention typically ranges from about 15 to 50 wt.%, preferably from about 20 to 45 wt.%, preferably from about 25 to 40 wt.% calculated on the total weight of all polymers, i.e. one or more solid siloxanes and one or more polyurethanes.

Despite the fact that various additives can contain any organic solvent, the total amount of one or more organic solvents is low, i.e. typically less than about 7 wt.%, preferably less than about 5 wt.%, and preferably less than about 2 wt.% in the calculation of the total mass of the aqueous dispersion of the composition, including various additives to it. Thus, the aqueous dispersion composition according to the present invention do not cause harm to the environment and yet provide low noise and low coefficients of friction when applied to the rubber or polymeric substrate.

The polyurethanes according to the present invention can be subjected to cross-linking after applying the aqueous dispersion of the composition on a substrate. Under cross-linking or curing means that the individual polyurethane chain linked chemically with at least one, preferably at least two other different polymer chains at points other than their ends. The preferred cross-linkage mechanism according to the present invention through one or more side groups, carboxylic acid polyurethane. Suitable agents for cross-linkage include various carbodiimide known in the art and the literature. Alternatively, it may be used various aziridine, bearing two or more aziridine groups, such as trimethylolpropane-Tris-(B-(N-aziridinyl)propionate) and pentaerythritol-Tris-(B-(N-aziridinyl)propionate). Carbodiimide and polyaniline agents for cross-linkage are VC is positive and otverzhdajutsja at temperatures constituting from about 50°C to 200°C, preferably from about 80°C to 190°C. within a relatively short time periods, such as from about 2 to 30 minutes. Of course, the implementation of the cross-linkage reaction should not start up until the aqueous dispersion composition is not deposited on the target substrate. The number of agent for cross-stitching typically varies from about 0.5 to 10 wt.%, preferably from about 1 to 5 wt.% calculated on the total weight polysiloxaneurethanes dispersion composition.

An important aspect of the present invention is the use of one or more polyolefins, preferably polyethylenes, such as a powder, crystal, resistant to high temperatures, the polyethylene is because they reduce the level of both dry and wet noise when they are applied to a seal for a vehicle, such as a sealant for cars. Such polyethylene are commercially available and, therefore, known in the art and the literature. The number of polyolefins, such as described above polyethylene typically ranges from about 5 to 8 or 35 weight parts, preferably from about 10 or 15 to 25 or 30 weight parts per 100 weight parts of one or more silox is new per se, and one or more polyurethanes per se, that is, free from water and solvents. Srednevekovaja preferred molecular weight polyethylene is usually very high, ranging from approximately 2 to 5 million, preferably about 3 to 4 million, and, therefore, the polyethylene can be classified as polyethylene ultra-high molecular weight. The size of the plastic powder can be different from the average or mean diameter of the particles constituting from about 20 to 50 microns.

Various additives, such as fillers, ceramic spherical particles, regulatory glitter additives, pigments, rheology modifiers, wetting agents, etc. may be used to impart various properties of an aqueous dispersion composition for coatings and/or its otverzhdennom the floor.

Fillers are used to reduce the cost and, often, to reduce the COF and noise. The fillers preferably are of different polymers, such as nylon, polytetrafluoroethylene, polyolefins and powder siloxane rubber. Such fillers help to reduce the coefficient of friction of dry coatings from aqueous dispersions according to the present invention. However, as for noise reduction, they usually show higher results relatively lower level of dry noise.

Use the of halogenated polymers should be avoided since it was found that they usually do not reduce noise, wet or dry, and usually are very expensive. Such polymers include polyvinyl chloride and various fluorocarbon polymers such as polytetrafluoroethylene, polivinilhlorid, polyvinylidene fluoride and polychlorotrifluoroethylene. When using their number is small, for example, typically less than about 10 weight parts, preferably less than about 5 weight parts, preferably less than about 2, or 1 weight parts, preferably zero, i.e. no weight parts per 100 total parts by weight of one or more polysiloxanes per se and one or more polyurethanes per se.

Another class of compounds, which should be avoided include various substances to increase the stickiness, because they usually increase low coefficient of friction, are sticky and do not separate quickly from metals, plastics, etc. and collect dirt and dust. Examples of substances to improve the adhesiveness, which should be avoided include various aromatic and aliphatic hydrocarbon resins, various rosin, such as rosin from tall oil, and esters of rosins, pine tar, various phenolic resins, various alkylphenol formaldehyde, etc.

Any of them used to be b the th very small, for example, typically less than about 10 or less than 5 weight parts, preferably less than about 2 weight parts, preferably 1 part or less, or zero, i.e. no weight parts per 100 total parts by weight of one or more polysiloxanes per se and one or more polyurethanes per se.

Another class of fillers includes ceramic spherical particles usually used as an extension known in the art and the literature. Suitable spherical particles include ceramic balls having an average diameter of about from 1 to 12 microns. Their number is usually from about 10 or 20 to about 35 or 40 weight parts per 100 weight parts of the aforementioned one or more polysiloxanes per se, and mentioned one or more polyurethanes per se.

To reduce the gloss of the cured coating can be used in different regulatory glitter additives in amounts from about 2 or 4 parts to about 7 or 9 weight parts per 100 weight parts of one or more polysiloxanes per se and one or more polyurethanes per se. Appropriate regulatory glitter additives known in the art and the literature, for example, various synthetic silica with a coating of wax.

More is thuja desirable is the use of different pigments thus, that the coating can generally match the color of the polymeric substrate. Because the seals are often black color, can be used in a variety of dispersion of black pigment, the majority of which represents a different carbon black, well known in the art and the literature. The number of such pigments can vary, for example, from about 0.1 to 5.0 weight parts per 100 weight parts of one or more polysiloxanes per se and one or more polyurethanes per se.

To prevent dripping, accumulation, sagging or dripping water dispersion composition for coating when it is applied to the substrate, and also to retain the dispersed polymer particles in water is often used rheology modifier or thickener. Can be used numerous types of commercially available thickeners in amounts comprising from about 0.5 or 1.5 to 2.5 or 3 weight parts per 100 weight parts of one or more polysiloxanes per se and one or more polyurethanes per se. Thickeners include various rheology modifiers, such as associative thickener based urethane.

Rheological additives also include numerous wetting agents, usually are desirable fluorinated who nonnie surfactants. Depending on the specific composition of the aqueous dispersion composition for coating their number may vary, for example, from about 0.05 to 0.5 weight parts per 100 weight parts of one or more polysiloxanes per se and one or more polyurethanes per se.

Aqueous dispersion composition according to the present invention is obtained by combining polysiloxane aqueous dispersions and polyurethane water dispersion and mixing. After this can be added regulatory gloss additive, and the mixture is subjected to mixing with a shift. Then the remaining components may be added either separately or all together, mixed and subjected to storage until such time as they are needed. Before applying to the substrate by any convenient method, such as dipping or brush application, while it is preferable to spraying, optionally add a crosslinking agent in the amount of about 1 to 5% wt. calculated on the total weight of the aqueous dispersion coating.

The substrate can be any substrate or a polymer having a low coefficient of friction coating and/or substrate, the end use of which involves a low level of noise when in contact with the item, for example, typically about 42 dBA or less, preferably about 38 dBA who does less and more preferably 36 dBA or less. In addition the present invention, which provides a good level of noise reduction in both dry and wet conditions, is an important aspect of ensuring good stability. In other words, the coating compositions according to the present invention for sealing a substrate coefficient of friction does not improve over time, and a surprising and unexpected way down. The initial static friction coefficients of the compositions according to the invention in accordance with ASTM test D-1894-95 are usually very low, for example, about 0.40 or less, preferably about 0.35 or less, and preferably 0.2 or less. These values actually decrease over time, so an important aspect of the present invention is that during aging the composition according to this invention has a low static friction coefficient after 12 weeks, 16 weeks, 20 weeks, 28 weeks and even 40 weeks following the initial values. It is very unusual, because up to the present time, the coefficient of friction is known coatings has always been raised. In this way the kinetic coefficient of friction with time fell, and according to test ASTM D-1894-95 took several months for their increase to the initial value. Thus, as a static test and kinetic test show that h is about time the value of the coefficient of friction is stabilized, while using well-known coating over time, typically has always been higher. The coating can be applied on all surfaces of various substrates, but usually the coating is applied only in part, namely, on the surface, in contact with painted metal or plastic, and/or which should have a low coefficient of friction clutch. Substrates include various kinds of rubber, i.e. elastomers, such as, but not limited to, elastomers, obtained from natural rubber, butadiene, isoprene, butadiene and styrene and rubber of ethylene-propylene-diene. Polymeric substrates include, but are not limited to, various compounds of acrylic, various vinyl or vinylidene polymers, such as polivinilhlorid and polystyrene, various types of polyamides, various types of polyesters, various types of polyurethanes, various types of polyolefins, various kinds of thermoplastic olefins, and various kinds of thermoplastic elastomer or vulcanizate, such as thermoplastic polyurethanes. The preferred end use of the composition is a coating sealer for vehicles to reduce noise, usually caused by friction of metal or plastic product or part. Vehicles include RA who personal the kinds of trucks, such as pickups, vans, vehicles, sports, cars, etc. Seals include any used on vehicles of the seals, especially the seals used on doors, Windows, hoods and seals for the tailgate.

As for the drawing, the seal 10, usually made from EPDM, comprises an area for mounting the body 12 attached to vehicle details, such as door ledge. Spongy thickening of EPDM may hook or contact with a part of the body of the vehicle, such as a door frame, creating a seal. The aqueous composition for coating 18 according to the present invention is applied to the spongy bulge 16, which will come into contact with the body of the vehicle.

The invention will become better understood with reference to the following examples, intended to illustrate and not limit the present invention.

The aqueous dispersion of the coating according to the present invention do not harm the environment because they are the compositions of water-based and contain very small amounts of solvents or does not contain them. They have low coefficients of friction, and provide a low noise when used as seals for transport what these tools.

Rubber seal coated is subjected to test in accordance with test General Motors, i.e. GM9842P Rev A. the Following is a description of such tests.

Standards GM Engineering, testing method GM9842P Rev A

1. Amount

This specification includes a description of the trials on the evaluation and regulation of acoustic output 2 same or different materials in dynamic contact.

Note: none of the provisions in this specification, however, does not supersede applicable laws and regulations in the absence of special instructions.

Note: in case of conflict between the English and any other language preference to English language.

2. Links

Note: in the absence of other indications are valid only last accepted standards.

2.1. Regulations

Not applicable.

2.2. GM

GM9840P GM9842P

3. Testing equipment

3.1. Soundproofing. Semi-anechoic chamber, is able to reduce pressure in the inner sound to the level of a maximum of 30 dB(A) (anti-vibration system, working with clip). In addition, this camera provides air conditioning to the specified limits of temperature and humidity (Section 5.1.).

3.2. Anti-vibration system. Anti-vibration system having sinus and be the decent features (section 5.3). Selected anti-vibration system usually belongs to the electrodynamic type, but it can also belong to another type, capable of providing a low noise level in such a way as to minimize the influence of acoustic measurements of the tested parts.

3.3. The measurement system.Calibrated microphone ANSI type 1 and system for collecting audio data (SDAS)capable And sustainable weighted average sound pressure levels (SPL) and charts the frequency domain 1/3 octave bands in the frequency range from 20 Hz to 20 kHz. This system must also have the ability to record sound examinees details in a digital file for further audiocassette.

3.4. Clips. Connector systems should provide a close approximation of the material deviation, and fit parts of the vehicle.

4. The material to be tested

4.1. Samples for testing. Tests shall be subjected to three samples. Samples should represent individual parts or cut pieces of rubber, plastics or the substrate with a length of 150 mm and a mutually acceptable and suitable for use as parts. The mating surfaces should, if possible, to approach existing in reality the profile and the surface to prevent possible see what the value or strength of interference samples.

5. Method test

5.1. Standard test conditions. In the absence of other indications, the standard temperature environment for testing should be 21±1°C and relative humidity 75±5%. In the absence of other indications of the standard surface for testing is a DuPont RK8010A Clearcoat. The height of the compression should be determined while selecting the items and must be deducted from the nominal value on the drawing details.

5.2. Calibration and record environmental noise. Before any measurement microphone and system for collecting audio data must be calibrated using traceable calibrator tone NIST capacity of 1 kHz. Tone calibration shows the amplitude component of 94 dB, while should be used with amplitude equal to 104 dB. The data received must be recorded in the minutes. The distance from the microphone to the test contact surfaces must be 150 mm, This distance must remain constant during the test and must be specified in the Protocol. Before contact with the test sample include vibrating system with a certain sinus or chaotic vibration profile and within 10 seconds record environmental noise. Its value should not exceed 30 dB(A) and shall be recorded in the minutes. Such entry is necessary to carry out re the each test series or at change of parameters of vibration. Range of environmental noise should be included in the Protocol.

5.3. Vibration profiles. In the following tables (tables 1 and 2) is specified as sinus, and random vibration profiles during the test samples.

Table 1
Chaotic vibration profile
FrequencyPSD (g2/Hz)Displacement (pk-pk)
5 Hz0,00650,308 inches (7,82 mm)
12,5 Hz0,0630,242 inches (6,14 mm)
20 Hz0,09950,151 inch (3,83 mm)
of 32.5 Hz0,14800,089 inches (of 2.26 mm)
50 Hzbeing 0.036is 0.023 inch (0.58 mm)
PSD - power spectral density
General G(RMS) = 1,945

Table 2
Sinus vibration profiles
FrequencyDisplacement (pk-pk)Substrate
9 Hz0.2 inches (5 mm)Elastomer (>65 shore a)
9 Hz0.04 in (1 mm)Plastic (≥65 shore a)

Each of the two above sinus profiles characteristic of the hardness of the composition of the connection.

5.4. Sample preparation. All surfaces should be clean and free from dirt or oils. All the samples or items must be rinsed with water, followed by drying at ambient temperature for 12 hours. In the absence of other indications glass, painted or metal surface before the test should be cleaned with isopropyl alcohol.

5.5. Test dry contact surfaces. Include system analysis of sound and vibration mechanism and record sound for 10 seconds in the form of a file of digital frequency domain. This step was repeated twice for at least three readings. The interval between readings is 2 minutes. Readings should be taken at the beginning of the vibration, after 2 minutes after the start and after 4 minutes after it started. In that case, if the noise is new data are unstable, test duration can be increased. Three sample parts subjected to repeated tests, each sample was measured three times.

5.5. Test wet the contact surfaces. With a pipette to the contact surface drip 2±0.25 ml of distilled water. The results recorded in the same way as in section 5.5.

(Optional) long-term strength test. The test sample can be optionally subjected to vibration during dry contact surface with a large number of cycles or for a long period of time to assess long-term acoustic properties.

6. Assessment and options

6.1. The results are shown in the form of average calculated values of 3 (the original, two minutes, four minutes) stable average values of the amplitude in dB(A) (per 20 micropascals).

6.2. In the testing GM9842P generally receive twelve values (four disorderly dry, four messy wet, four sinus dry and four sinus wet) for each of the three samples of seals.

TABLE of TEST RESULTS

Sample No. 1
CONDITIONSDisorderly/
dry
Disorderly/
wet
Sinus/
dry
Sinus/ wet
READINGSThe initial
reading
The initial
reading
The initial
reading
The initial
reading
Reading through
2 min
Reading through
2 min
Reading through
2 min
Reading through 2 min
Reading through
4 min
Reading through
4 min
Reading through
4 min
Reading through the 4 min
VALUEAverageAverageAverageAverage
Sample # 2
CONDITIONS Disorderly/
dry
Disorderly/
wet
Sinus/
dry
Sinus/
wet
READINGS
The initial
reading
The initial
reading
The initial
reading
The initial
reading
Reading through
2 min
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2 min
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2 min
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4 min
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4 min
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4 min
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VALUEAverageAverageAverageAverage

Sample # 3
USL IS VIA Disorderly/
dry
Disorderly/
wet
Sinus/
dry
Sinus/
wet
READINGS
The initial
reading
The initial
reading
The initial
reading
The initial
reading
Reading through
2 min
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2 min
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2 min
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4 min
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4 min
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VALUEAverageAverageAverageAverage
Any average in excess of 40 dBA is considered unacceptable

6.3. Values greater than 40 dB(A), are considered unacceptable.

7. Protocol

Protocollagen to include the following information: laboratory for testing must provide spectra the frequency domain with a minimum resolution, components of 1/3 octave frequency range. The complete Protocol should also contain information about environmental sample environment, including measurements of environmental noise, temperature and relative humidity, as well as a copy of the calibration certificate NIST. Data should be provided on the test sample, such as the surface of the counting, the oscillation frequency, stroke length, the degree of deviation or normal load power, test duration and the condition of the contact surface between the sample and the conjugate surface (dry, wet etc).

8. Approved criteria

For such specifications require technological skills in accordance with the approved guide. It was found that the only criteria that meet the requirements of this specification from a technological point of view with respect to the specified number of specifications that are listed in the GM Corporate Materials File. Information about these criteria can be obtained via an on-line system MATSPC.

9. Security

This method may involve hazardous materials, operations and equipment. This method does not address all safety problems associated with its use. Before using this method should be taken appropriate safety measures and health protection and installed eminimall regulatory restrictions.

9. The coding system

This test is indicated in other documents, drawings, VTS, CTS, as follows: “the Test according GM9842P”.

10.1. Development and amendment

10.1. Development. This standard was developed in collaboration with the laboratories custom acoustic research and screening environmental research (Custom Acoustic Research and Environmental Screening Test Laboratories (ESTL)). This standard was developed by a Group of specialists on seals in December 1997 and was first published in September 1998

10.2. Amendments

AmendmentDateDescription/ReasonOrganization/
the Committee on development
AndDecember
1998
Room specifications changed from GM9840P GM 9842P. The room was assigned incorrectly. Transferred from the General guidance in the Procedural manual.Group
specialists on seals
InJanuary 2002Format changed; changed original limit 30 dB(A); added standard test conditions; added requirements for deviation UE is Otani; added table for recording test resultsGroup
specialists on seals

Example

The composition And refers to the aqueous dispersion coating according to the present invention provides low levels of wet and dry noise after application to the sealing substrate made of EPDM. The seal used in all examples is a typical relief spongy thickening for the primary door seals, which, as shown in the drawing, has a typical composition of EPDM.

The composition And

% The content-the content of solidsThe total content weight parts
Water-based polyurethane-polycarbonate39%17,21
Powder polyethylene ultra-high molecular weight (bulking)100%4,0
Ceramic balls (filler), the average diameter of which is 1-12 microns100%6,40
Silicon dioxide coated synthetic wax (agent for R. the regulation of Shine) 100%1,14
Silicone resin is an aqueous dispersion35%40,15
The pigment - dispersion carbon black30%1,93
Water (DI)0%26,86
Rheological additives21%2,31
The total mass100,00

The dispersion of the polyurethane and the dispersion of the polysiloxane or silicone resin is placed in a container and mix with approximately half the weight of a moisturizing agent for approximately 15 minutes. Then add the agent to control Shine and mix with moderate shear using a pneumatic vane Hochmeyer for about 15 minutes. Then, in any order, add remaining ingredients and mix with stirring. After adding all of the various components, the mixture is stirred for about 20 minutes, and then filtered and packaged for storage. Before using with stirring, add about 3 wt.% to bodiimide cross-linking agent. Agents for cross-linkage is also used in all subsequent examples. A mixed composition for coating is then applied to the substrate of EPDM using turnersville or spray gun for HVLP. The viscosity of the spraying typically ranges from 20 to about 50 seconds when measured in a Zahn Cup #3. The total content of solids in the composition for coating generally ranges from about 30 to 35 wt.%, and the thickness of the dry coating or film is approximately from 0.2 to 0.6 mile.

The substrate with the coating and then subjected to test in accordance with test method GM GM9842P, Rev A. the data Obtained are presented in table 1.

Table 1
Composition(dBA)
Disorderly dry
(dBA)
Messy wet
(dBA)
Sinus dry
(dBA)
Sinus
wet
The composition And35382627

As follows from the above data, a good low dBA values were obtained in random m is chrome and dry tests, and very good data were obtained in wet and dry sinus tests.

Examples B, C, D and E

Additional water dispersion coating according to the present invention have the following structures:

COMPOSITIONS B, C, D and E

The composition (total weight parts)
Ingredient% Dry matterInDE
Water-based polyurethane-polycarbonate39%16,6416,6416,6416,64
Powder polyethylene ultra-high molecular weight (bulking)100%a 3.87a 3.87a 3.87a 3.87
Ceramic balls (fillers), the average diameter of which is 1-12 microns100%to 6.19 to 6.19to 6.19to 6.19
Silicon dioxide coated synthetic wax (agent for regulating Shine)100%`1,101,101,101,10
Silicone resin water dispersion (% dry matter)(35%)
38,82
(35%)
38,82
(50%)
38,82
(40%)
38,82
The pigment - dispersion carbon black30%1,871,871,871,87
Water (DI)0%29.67 per29.67 per41,3134,51
Rheological additives21%1,841,841,841,84

Compositions b-E were obtained by the method described in example a, and subjected to the tests according to the same test the GM of the substrate to seal the same type. The results obtained are presented in table 2.

Table 2
Composition(dBA)
Dry, messy
(dBA)
Wet, messy
(dBA) Dry sinus(dBA) Wet, sinus
B33,036,625,427,1
C33,736,327,227,3
Dof 31.435,026,127,8
E33,3of 37.825,626,8

As follows from the above data, a very good low dBA values were obtained both in wet and dry sinus trials, and in messy wet and dry tests.

Compared with tables 1 and 2 in table 3 presents the data obtained in the rez is ltate conducting the above tests GM and the substrate to seal EPDM. As control were used and subjected to the tests on the noise level of the product Lord Corporation #1, #2 and #3.

Table 3
Floor(dBA)
Disorderly dry
(dBA)
Messy wet
(dBA)
Sinus dry
(dBA)
Sinus wet
The product is Lord #150654163
The product is Lord #234552850
The product is Lord #330622561

As follows from table 3, very high values of dBA were obtained as in messy wet and wet sinus trials. For comparison, the above data on compositions a-E were much lower, in some cases more than 50% lower.

COMPOSITIONS F and G

Composition
F
Composition
G
IngredientThe percentage of solidsThe total content of abolition weight partsThe total content of abolition weight parts
Water-based polyurethane-polycarbonate39%16,6413,21
The polyethylene powder with
ultra high molecular weight (bulking)
100%a 3.872,93
Ceramic balls (fillers), the average diameter of which is 1-12 microns100%to 6.196,30
Silicon dioxide coated synthetic wax (agent for regulating Shine)100%1,10-
Silicone resin is an aqueous dispersion50%
40%
27.18 per
-

39,69
The pigment - dispersion carbon black30%1,871,90
Water (DI)0%41,3125,55
Rheological additives21%1,841,87
m-Pyrrolidone0%-8,55

At the same time testing has been three commercial products, i.e. comparative products #1 and #2, and the product is Lord #3.

Table 4
Floor(dBA)
Dry messy
(dBA)
Wet messy
(dBA)
Dry sinus
(dBA)
Wet sinus
Composition F30,430,624,924,2
The composition G1,5 35,124,226,7
Comparative product #134,142,727,040,6
Comparative item #2of 37.847,129,240,4
The product
Lord #3
27,657,223,5557,1

As follows from table 4, the composition of F and G according to the present invention show excellent results with low noise even in comparison with the results of wet messy wet and sinus trials, while commercial products show very high values of the noise level.

Examples H, I, J and K

Other formulations of coatings for seals below.

Compositions H, I, J and K

% The content of the silicone resin47%57%66%75%
% SolidsHIJK
Water-based polyurethane-polycarbonate39%28,2123,2118,2113,21
The polyethylene powder with
ultra high molecular weight (bulking)
100%2,932,932,932,93
Ceramic balls (fillers), the average diameter of which is 1-12 microns100%6,306,306,306,30
Silicone resin is an aqueous dispersion40%24,6929,6934,6939,69
The pigment - dispersion carbon black30%1,901,901,90 1,90
Water (DI)0%25,5525,5525,5525,55
m-Pyrrolidon0%8,558,558,558,55
Rheological additives21%1,871,871,871,87
Only100,00100,00100,00100,00

Compositions H, I, J and K were obtained by the method described in example a, and subjected to the same test GM and the same type of substrate as in example A. the results of determining the noise levels presented in table 5.

Table 5
STRUCTURES
HIJ K
Noise (dBA)
Messy wet40,736,736,635,9
Sinus wet26,825,926,727,0
Disorderly dry34,133,131,732,3
Sinus dry24,825,224,624,8

As follows from table 5, various tests were again received a very low noise levels in dBA. Moreover, as for the wet tests and especially messy wet tests, except for the composition H were easily obtained values less than 38 dBA. Example H shows that to obtain a good messy wet properties usually requires a large amount of silicone resin, i.e. more than 50 wt.%, and in combination from about 3 wt.%. RE powder.

Examples L, M and N

Aqueous dispersion composition according to the present invention were also subjected to the tests relatively long retention of static and dynamic coefficient of friction. The compositions of such aqueous dispersion compositions presented in the compositions L, M and N, which were used in a variety of fillers, however, were obtained in good to low values dBA, as well as good value stability.

Compositions L,M and N

% SolidsCOMPOSITION
LMN
Water-based polyurethane-polycarbonate39%28,6828,6817,21
The polyethylene powder with
ultra high molecular weight (bulking)
100%2,982,982,98
Ceramic balls (fillers), the average diameter of which with the hat 1-12 microns 100%6,406,406,40
Fluorinated polymer dispersion50%-2,98-
Silicone resin is an aqueous dispersion35%28,6828,6840,15
The pigment - dispersion carbon black30%1,931,931,93
Water (DI)0%30,6930,6930,69
Rheological additives21%2,312,312,31
Only101,67104,65101,67

After mixing the above ingredients with obtaining these compositions and immediately prior to their application at the UE is atstumu substrate of EPDM in accordance with GM 9842P, Rev. Add A 3 wt.% (based on the total weight of the composition) of the above described cross-linking agent and the resulting mixture is stirred.

The resulting test data regarding the level of noise, light and friction coefficient are presented in table 6.

Table 6
COMPOSITION
LMN
Dry sinus (dBA)24,423,924,7
Wet sinus (dBA)27,827,428,4
Dry chaotic (dBA)30,728,632,9
Wet messy (dBA)35,034,635,4

According to these data, again good results have been obtained with low noise level dBA, including wet messy ordeal.

The compositions of L Is N were subjected to the tests according to test ASTM D1894-95, by definition, a static friction coefficient depending on time. The following results were obtained.

Table 7
Times/WeekComposition LComposition N
StaticKineticStaticKinetic
00,3250,2360,2980,216
40,2430,1560,2020,145
80,1930,1260,2210,134
120,2120,1700,1790,152
160,2910,2570,2670,217
20 0,2790,2280,229of 0.182
280,2660,2440,2440,200
400,3300,2690,2480,227

As follows from the above data, the standard coefficient of friction with time after the specified periods of time (weeks) was always lower than the initial coefficient of friction. The corresponding COF becomes significant over time to preserve the possibility of a good separation of the ice and the low level of accumulation of dirt on the seal of the door.

Despite the fact that, in accordance with the patent laws were best described and preferred embodiments of the present invention, the scope of the present invention is not limited to them, and displacement of the attached claims.

1. Aqueous dispersion composition for coating on a rubber or polymeric substrate, including:
polymer mixture containing (a) an aqueous dispersion of at least one polysiloxane and (b) an aqueous dispersion of at least one of polyurethane, in which the content mentioned at least od the CSOs polysiloxane polymer varies from about 50 to 85 wt.%, and the content of the above at least one polyurethane ranges from about 15 to 50 wt.% calculated on the total weight of solids mentioned at least one polysiloxane polymer and said at least one polyurethane, these polyurethane obtained from at least one aliphatic or cycloaliphatic diisocyanate and at least one hydroxyl-terminated intermediate compounds, such as polycarbonate, complex polyester or polyester, or a combination;
the said polyurethane is a thermoset; and (C) the polyolefin powder with ultra-high molecular weight in the amount of approximately from 5 to 35 parts per 100 total parts mentioned one or more polysiloxanes and mentioned one or more polyurethanes;:
mentioned aqueous dispersion contains about 7 wt.% or less of organic solvent based on the total weight of the aforementioned dispersion of the composition;
mentioned polymer mixture contains from less than approximately 10 to 0 parts of a substance to increase the stickiness per 100 total parts mentioned at least one polyurethane and said at least one polysiloxane; and
mentioned polymer mixture contains from less than approximately 10 to 0 parts of halog soderzhaschego polymer per 100 total parts the mentioned at least one polyurethane and said at least one polysiloxane.

2. Aqueous dispersion composition according to claim 1, in which the content of the above polysiloxane is from about 55 to 80 wt.% and in which the content of the above polyurethane is from about 20 to 45 wt.% calculated on the total weight of the aforementioned at least one polysiloxane polymer and at least one polyurethane polymer.

3. Aqueous dispersion composition according to claim 2, in which the above-mentioned polyolefin includes polyethylene in the amount of about 10 parts to 30 parts, and in which the said polyurethane is obtained using the intermediate polyether.

4. Aqueous dispersion composition according to claim 3, in which srednevekovaja molecular weight of the above-mentioned polyethylene is from about 2 to 5 million; in which the content of the above substances to increase the stickiness is less than about 5 parts; and in which the content of the above halogenated polymer is less than about 5 parts

5. Aqueous dispersion composition according to claim 4, in which the above-mentioned polysiloxane is a poly(dimethylsiloxane), in which the amount of any polysiloxane having an amine end group composition is employed, about 10 wt.% or less based on the total weight of all polysiloxanes, in which the content of the above polyethylene is from about 15 to 25 parts, in which the content of any organic solvent comprises about 5 wt.% or less; in which the content of the above substances to increase the stickiness is less than about 1 parts; and in which the content of the above halogenated polymer is less than 1 parts

6. Aqueous dispersion composition according to claim 5, in which the content of the above polysiloxane is from about 60 to 75 wt.% and in which the content of the above polyurethane is from about 25 to 40 wt.% calculated on the total weight of the aforementioned at least one polysiloxane and at least one polyurethane; and in which srednevekovaja molecular weight of the above-mentioned polyethylene is approximately 3 to 4 million

7. Polymeric or rubber substrate at least partially covered with dried aqueous composition according to claim 1, whose wet messy noise mentioned substrate in accordance with the method of testing GM9842P, Rev. And approximately 40 dBA or less.

8. Polymeric or rubber substrate at least partially covered with dried aqueous composition according to claim 3, where said substrate is made of rubber, acrylate, vinyl or vinylidene polymer, polyamide, complex is on polyester, polyurethane, polyolefin, thermoplastic olefin or thermoplastic vulcanizate or combinations thereof; for which level wet messy noise mentioned substrate in accordance with the method of testing GM9842P, Rev. And approximately 40 dBA or less.

9. Polymeric or rubber substrate at least partially covered with dried aqueous composition according to claim 5, in which said substrate is made of rubber, acrylate, vinyl or vinylidene polymer, polyamide, complex, polyester, polyurethane, polyolefin, thermoplastic olefin or thermoplastic vulcanizate or their combinations, in which the level of the wet messy noise mentioned substrate in accordance with the method of testing GM9842P, Rev. And is approximately 38 dBA or less and in which the said substrate in accordance with ASTM D1894-95 has an initial static coefficient of friction values, amounting to about 0.40 or less.

10. Polymeric or rubber substrate at least partially covered with dried aqueous composition according to claim 6, in which said substrate is composed of ethylene-propylene-diene rubber, thermoplastic elastomer or thermoplastic olefin or combinations thereof, in which the level mentioned wet messy noise mentioned substrate in accordance with the method of testing GM9842P, Rev. And is OK the lo 36 dBA or less and in which the said substrate in accordance with ASTM D1894-95 has an initial static coefficient of friction values, average of about 0.32 or less.

11. Seal for a vehicle at least partially covered with dried aqueous composition according to claim 1, in which the level mentioned wet messy noise mentioned substrate in accordance with the method of testing GM9842P, Rev. And is about 42 dBA or less.

12. Seal for a vehicle at least partially covered with dried aqueous composition according to claim 3, in which the level mentioned wet messy noise mentioned substrate in accordance with the method of testing GM GM9842P, Rev. And approximately 40 dBA or less.

13. Seal for a vehicle at least partially covered with dried aqueous composition according to claim 5 in which the said seal is a rubber, acrylate, polyamide, urethane, or combinations thereof, and in which the level of the wet messy noise mentioned substrate in accordance with the method of testing GM GM9842P, Rev. A is about 38 dBA or less.

14. Seal for a vehicle at least partially covered with dried aqueous composition according to claim 6, in which the said seal comprises rubber, acrylate, polyamide, urethane, or combinations thereof, and in which the level of the wet messy noise mentioned substrate in accordance with the method of testing GM9842P, Rev. And is about 6 dBA or less.

15. Seal in claim 11 in which the said seal in accordance with ASTM test D-1894-95 has an initial static coefficient of friction values, amounting to about 0.40 or less.

16. Seal indicated in paragraph 12, in which the said seal in accordance with ASTM test D-1894-95 has an initial static coefficient of friction values of about 0.35 or less.

17. Sealant around 14 in which the said seal in accordance with ASTM test D-1894-95 has an initial static coefficient of friction values, amounting to about 0.32 or less and in which the static coefficient of friction is maintained for at least about 40 weeks.



 

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26 cl, 110 ex, 33 tbl, 26 dwg

FIELD: chemistry.

SUBSTANCE: disclosed is an aqueous polyurethane dispersion which does not contain N-methylpyrrolidone and solvents and contains a product of reaction of a mixture of 1-isocyanate-3,3,5-trimethyl-5-isocyanatemethylcyclohexane and 4,4'-diisocyanatedicyclohexylmethane, one or more polyols with average molecular weight of 500-3000, one or more compounds with at least one OH- or NH- functional group, which contain a carboxyl and/or carboxylate group, where at least 50 mol % acid incorporated in the overall resin consists of dimethylol propionic acid, one or more polyols and/or polyamines with average molecular weight less than 500 and, if necessary, one or more monoalcohols and/or monoamines, as well as preparation method thereof and use thereof as an agent for coatings having good resistance characteristics.

EFFECT: obtaining a polyurethane dispersion which does not contain N-methylpyrrolidone and solvents, and contains a hydrophilization agent in form of dimethylol propionic acid, which can be stored for over 8 weeks and is suitable for making transparent shining coatings with high resistance to dyes.

8 cl, 2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to aqueous coating compositions with low content of volatile organic compounds. The aqueous coating composition contains water, oxidative-curable resin, at least 1.5% of the weight of the composition of a non-structured alkali-soluble acrylate, having weight-average molecular weight Mw of 200000 g/mol or lower, and acid number of at least 15 mg KOH/g; and an emulsified second acrylate having Mw of at least 300000 g/mol. Content of the alkali-soluble acrylate in the composition is equal to at least 3 wt %. The weight ratio of the alkali-soluble acrylate to the second emulsified acrylate ranges from 1:0.5 to 1:5, and the weight ratio of the alkali-soluble acrylate to the oxidative-curable resin ranges from 1:0.5 to 1:10. The oxidative curable resin is an alkyd resin, alkyd-urethane resin. The second acrylate is cross-linkable, for example azomethine cross-linkable links.

EFFECT: aqueous coating composition has good physical and mechanical properties.

9 cl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polyurethanes and articles made from said polyurethanes, as well as to laminated material and coating composition containing such polyurethanes. The polyurethane is a product of a reaction between components which contains less than approximately 10 wt % polyesterpolyol and/or polyetherpolyol, where the components are selected from: (a) approximately 1 equivalent of at least one polyisocyanate; (b) approximately 0.05-0.9 equivalent of at least one branched polyol which contains 3-18 carbon atoms and at least 3 hydroxyl groups; and (c) approximately 0.1-0.95 equivalent of at least one diol which contains 2-18 carbon atoms, where during mixing, the reaction components are held at reaction temperature of at least approximately 100°C for at least approximately 10 minutes.

EFFECT: production of polyurethanes, articles of which are made through casting or reaction injection moulding and have good optical properties, high resistance to impact loads, high impact resistance, high K-ratio, good ballistic stability, good resistance to solvents and good weather resistance.

37 cl, 113 ex, 82 tbl, 26 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a moisture-curable composition for adhesive compounds, sealing compounds, coatings or linings, application thereof as an adhesive, sealing compound or coating, a cured composition obtained by reacting water with such a composition, methods of gluing bases and sealing using said composition, as well as adhesive and sealed articles made using said methods, respectively. The moisture-curable composition contains (i) at least one isocyanate-containing polyurethane polymer P, which is obtained from at least one polyisocyanate and at least one polyol, and (ii) at least one aldimine-containing compound of formula (I): .

EFFECT: preparation of compounds which are stable during storage, can be quickly moisture-cured without bubbles, do not cause smells during curing and are suitable for use as precursors of synthetic materials.

25 cl, 34 ex, 10 tbl

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention relates to coating composition, applied, for instance, as transparent coatings, base coatings, pigmented coating layers, used, prime coatings, etc. Composition contains polyisocyanate, polyol, metal-based catalyst for carrying out reaction of addition reaction between isocyanate groups and hydroxyl groups, thiol-functioning compound and carboxylic acid, carbonyl group of carboxylic acid being in connection with π-electronic system.

EFFECT: creation of novel coating composition, demonstrating presence of favourable property balance, namely, low level of volatile organic solvent content with operation viscosity, high rate of hardening and long viability, which results in obtaining coatings, which demonstrate good outlook characteristics, in particular, low liability to formation of pinholes, and good hardness.

14 cl, 2 tbl

FIELD: construction.

SUBSTANCE: composition for coats contains isocyanate prepolymer produced by interaction of 4,4'-diphenylmethanediisocyanate and oligodiendiol with molecular weight of 2800-3200, content of hydroxyl groups 0.88-1.3% at the ratio of isolcyanate and hydroxyl groups of 4:1 with content of isocyanate groups in prepolymer of 8.0-9.7%, wt parts - 15-70, base - rubber composition from low-molecular hydroxyl-containing rubber, plasticiser, filler, anti-ageing agent and pigment - 100, catalyst of urethane production - 0.05-0.15 and glycerin 0.7-3.0.

EFFECT: higher strength, hardness and relative extension of coats.

2 tbl

FIELD: chemistry.

SUBSTANCE: woven belt is a coated belt made by depositing a urethane-based composition onto the surface of the said belt, where the said composition contains nanoparticles of filler selected from a group consisting of nanoparticles of clay, soot, silicon carbide, metal oxides and combinations of said nanoparticles. Content of nanoparticles of filler in the coating ranges from 0.01 to 10 wt %.

EFFECT: obtained belt increases resistance to bending fatigue, resistance to development of cracks, resistance to joining of grooves and wear resistance of urethane coatings of belts and shafts, increases water resistance and oil resistance of belts and shafts with urethane coating.

18 cl, 2 ex, 4 tbl, 6 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a water-soluble coating composition containing a) polyol, b) polyisocyanate cross-linking agent and c) a compound with a thiol functional group in which molar ratio of isocyanate groups to thiol groups lies between 1:0.0001 and 1:0.4. The invention also relates to use of the coating composition as a transparent or pigmented external coating, basic coating, filler, prime coating or binding material, in painting or repainting automobiles and large vehicles, and to a set for preparing the coating composition.

EFFECT: obtaining a composition which provides a balance between high rate of solidification, long life and good appearance of the coating film made from the said composition.

17 cl, 3 dwg, 7 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to obtaining new aspartates. Aspartates are obtained by reacting di- or polyamine with an unsaturated ester and then by reacting the obtained product with maleinimide.

EFFECT: obtaining new aspartates and their use as reactive components for polyiisocyanates in two-component compositions for polyurethane coatings.

4 cl, 3 ex, 1 tbl

FIELD: glazing of buildings and automobiles.

SUBSTANCE: proposed glazing 1 contains glazing member 2 with press-fitted plastic part 3 and at least one rigid member 5, 8 included or fitted in press-fitted plastic part. Said rigid member or members 5, 8 have linear thermal expansion coefficient different from that of glazing member 2 by not more than 10-60C-1. Such glazing is used to form electrochromic windows.

EFFECT: improved reliability owing to prevention of violation of integrity of glazing.

14 cl, 3 dwg

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